2010/10/7 Josu Rodriguez Vilda <jrvi...@gmail.com>
> Hola a Todos,
>
>
> Necesito capturar la pantalla en Windows, solo que los intentos que he
> realizado, ninguno captura las interface transparentes como por ejemplo la
> ventana de buscar y reemplazar del notepad++.
>
> He intentado estos metodos y todos funcionan para capturar pantalla pero
> ninguno recoge las transparencias. ( no se ven las ventanas transparentes,
> como si no existiesen)
>
> from PIL import ImageGrab
> import time
>
> time.sleep(5)
> box = (100,100,400,400)
> ImageGrab.grab().crop(box).save("screen_capture.jpg", "JPEG")
>
>
> *import* Image
> *try*:
> # built-in driver (1.1.3 and later) grabber =
> Image.core.grabscreen*except* AttributeError:
> # stand-alone driver (pil plus) *import* _grabscreen
> grabber = _grabscreen.grab
> ### (New in 1.1.3) Take a snapshot of the screen. The pixels inside the#
> bounding box are returned as an "RGB" image. If the bounding box is#
> omitted, the entire screen is copied.## @param bbox What region to copy.
> Default is the entire screen.# @return An image# @since 1.1.3*def*
> grab(bbox=None):
> size, data = grabber()
> im = Image.fromstring(
> "RGB", size, data,
> # RGB, 32-bit line padding, origo in lower left corner "raw",
> "BGR", (size[0]*3 + 3) & -4, -1
> )
> *if* bbox:
> im = im.crop(bbox)
> *return* im
> ### (New in 1.1.4) Take a snapshot of the clipboard image, if any.## @return
> An image, a list of filenames, or None if the clipboard does# not contain
> image data or filenames. Note that if a list is# returned, the filenames
> may not represent image files.# @since 1.1.4*def* grabclipboard():
> debug = 0 # temporary interface data = Image.core.grabclipboard(debug)
> *if* Image.isStringType(data):
> *import* BmpImagePlugin, StringIO
> *return* BmpImagePlugin.DibImageFile(StringIO.StringIO(data))
> *return* data
>
>
>
> import win32gui, win32ui, win32con, win32api
>
>
>
>
>
> hwnd = win32gui.GetDesktopWindow()
>
>
> print hwnd
>
>
>
>
>
> # you can use this to capture only a specific window
>
>
> #l, t, r, b = win32gui.GetWindowRect(hwnd)
>
>
> #w = r - l
>
>
> #h = b - t
>
>
>
>
>
> # get complete virtual screen including all monitors
>
>
> SM_XVIRTUALSCREEN = 76
>
>
> SM_YVIRTUALSCREEN = 77
>
>
> SM_CXVIRTUALSCREEN = 78
>
>
> SM_CYVIRTUALSCREEN = 79
>
>
> w = vscreenwidth = win32api.GetSystemMetrics(SM_CXVIRTUALSCREEN)
>
>
> h = vscreenheigth = win32api.GetSystemMetrics(SM_CYVIRTUALSCREEN)
>
>
> l = vscreenx = win32api.GetSystemMetrics(SM_XVIRTUALSCREEN)
>
>
> t = vscreeny = win32api.GetSystemMetrics(SM_YVIRTUALSCREEN)
>
>
> r = l + w
>
>
> b = t + h
>
>
>
>
>
> print l, t, r, b, ' -> ', w, h
>
>
>
>
>
> hwndDC = win32gui.GetWindowDC(hwnd)
>
>
> mfcDC = win32ui.CreateDCFromHandle(hwndDC)
>
>
> saveDC = mfcDC.CreateCompatibleDC()
>
>
>
>
>
> saveBitMap = win32ui.CreateBitmap()
>
>
> saveBitMap.CreateCompatibleBitmap(mfcDC, w, h)
>
>
> saveDC.SelectObject(saveBitMap)
>
>
> saveDC.BitBlt((0, 0), (w, h), mfcDC, (l, t), win32con.SRCCOPY)
>
>
> saveBitMap.SaveBitmapFile(saveDC, 'screencapture.bmp')
>
>
>
>
>
>
> 1. import wx
> 2.
> 3. app = wx.PySimpleApp()
> 4.
> 5. context = wx.ScreenDC()
> 6. r, b = context.GetSize()
> 7.
> 8.
> # i have a second monitor left of my primary, so these value are negativ
> 9. l, t = (-1280, -256) # coulfn't find a wx function to get these
> 10.
> 11. w, h = (r - l, b - t)
> 12. bitmap = wx.EmptyBitmap(w, h, -1)
> 13.
> 14. memory = wx.MemoryDC()
> 15. memory.SelectObject(bitmap)
> 16. memory.Blit(0, 0, w, h, context, l, t)
> 17. memory.SelectObject(wx.NullBitmap)
> 18.
> 19. #bitmap.SaveFile("screencapture.bmp", wx.BITMAP_TYPE_BMP)
> 20. #bitmap.SaveFile("screencapture.jpg", wx.BITMAP_TYPE_JPEG)
> 21. bitmap.SaveFile("screencapture.png", wx.BITMAP_TYPE_PNG)
>
>
>
> --
> *Josu Rodriguez Vilda*
> *
> *
>
Lo he visto en [1]
Con esto sí que parece funcionar (lo he probado con notepad++ abierto y con
la ventana buscar abierta):
>>> import sys
>>> from PyQt4.QtGui import QPixmap, QApplication
>>> app = QApplication(sys.argv)
>>>
QPixmap.grabWindow(QApplication.desktop().winId()).save('test.png','png')
pero necesitas tener instalado PyQt4.
La segunda opción que ponen en [1] no me ha funcionado y ocurre lo que tú
dices, no graba la ventana buscar de notepad++:
>>> import ImageGrab
>>> img = ImageGrab.grab()
>>> img.save('test.jpg', 'JPEG')
[1] http://es.w3support.net/index.php?db=so&id=69645
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